活化方式对有序介孔炭孔结构及电化学性能的影响

刘美君; 付冬梅; 王春雷; 米盼盼; 王同华

活化方式对有序介孔炭孔结构及电化学性能的影响

1.
大连理工大学化工学院精细化工国家重点实验室炭素材料研究室, 辽宁大连 116024;
2.
中国科学院大连化学物理研究所, 辽宁大连 116023

基金项目: 国家自然科学基金（21176036，21276035，21107108，21376037）；国家高技术研究发展计划（863计划，2012AA03A611）.

详细信息

作者简介:
刘美君,硕士研究生.E-mail:happyeveryday6048@126.com

通讯作者:
王春雷,副研究员.E-mail:clwang-chem@dlut.edu.cn

中图分类号: TB383
计量
- 文章访问数: 378
- HTML全文浏览量: 55
- PDF下载量: 721
- 被引次数: 0
出版历程
- 收稿日期: 2016-12-25
- 录用日期: 2017-04-26
- 修回日期: 2017-03-10
- 刊出日期: 2017-04-28

The effects of activation method on the pore structure and electrochemical properties of ordered mesoporous carbons used as the electrode materials of supercapacitors

1.
State Key Laboratory of Fine Chemicals, Carbon Research Laboratory, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China;
2.
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

Funds: National Natural Science Foundation of China (21176036, 21276035, 21107108, 21376037); National High Technology Research and Development Program of China (863 Program,2012AA03A611).

摘要

摘要: 采用软模板法合成有序介孔炭（OMC），并通过不同的活化方式对OMC进行活化处理，以制备出具有较高比表面积的微/介孔炭材料。利用小角X射线衍射、氮气吸附、扫描及透射电镜对活化前后介孔炭的孔结构进行表征；循环伏安、恒流充放电、交流阻抗等方法测试其电化学性能。探讨不同活化方式对介孔炭孔结构和电化学性能的影响。结果表明：高温活化在保持介孔炭的有序性及其二维六角结构的基础上，在其孔隙结构中形成了大量微孔结构，有效地提高了介孔炭的孔体积及比表面积，比表面积由674 m²/g提高到2 404 m²/g，孔体积由0.98 cm³/g提高到2.24 cm³/g，并进一步提高了介孔炭的电化学性能，在500 mA/g电流密度下，其比电容可达175 F/g。活化方式对活化后的介孔炭的孔结构及电化学性能有很大的影响。
- 介孔炭 /
- 活化方式 /
- 孔结构 /
- 电化学性能
Abstract: An ordered mesoporous carbon (OMC) synthesized by the soft-template method was activated by (a) CO₂ at 900℃ for 4 h, (b) H₂O at 800℃ for 20 min, and (c) H₂O at 800℃ for 20 min followed by CO₂ at 900℃ for 4 h to produce three micro-mesoporous carbons, A1, A2 and A3, respectively. Their pore structures were investigated by XRD, TEM, SEM and N₂ adsorption. Their electrochemical properties as the electrode materials of supercapacitors were investigated by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. Results indicated that the highly ordered 2D hexagonal original mesostructure of the OMC was well retained after activation. The increasing order of the extent of activation is A1 < A2 < A3. The specific surface area, pore volume and the specific capacitance of A3 compared to OMC respectively increased significantly from 673 to 2404 m²/g, from 0.98 to 2.24 cm³/g and from 70 to 175 F/g at a current density of 500 mA/g. The increasing order of the capacitance retention ratios of the activated samples at high current densities is A1 < A2 < A3.
- Mesoporous carbons /
- Activated methods /
- Pore structure /
- Electrochemical properties

HTML全文

下载: 全尺寸图片幻灯片

参考文献(16)

Zalusky A S, Olayo-Valles R, Wolf J H, et al. Ordered nanoporous polymers from polystyrene-polylactide block copolymers[J]. Journal of the American Chemical Society, 2002, 124(43): 12761-12773.

Deng H, Gin D L, Smith R C. Polymerizable lyotropic liquid crystals containing transition-metal and lanthanide ions: Architectural control and introduction of new properties into nanostructured polymers[J]. Journal of the American Chemical Society, 1998, 120(14): 3522-3523.

Kanungo M, Kumar A, Contractor A Q. Studies on electropoly merization of aniline in the presence of sodium dodecyl sulfate and its application in sensing urea[J]. Journal of Electroanalytical Chemistry, 2002, 528(1-2): 46-56.

Hedrick J L, Miller R D, Hawker C J, et al. Templating nanoporosity in thin-film dielectric insulators[J]. Advanced Materials, 1998, 10(13): 1049-1053.

Lee J, Yoon S, Hyeon T, et al. Synthesis of a new mesoporous carbon and its application to electrochemical double-layer capacitors[J]. Chemical Communications, 1999(21): 2177-2178.

Zhao J, Gao F, Fu Y, et al. Biomolecule separation using large pore mesoporous SBA-15 as a substrate in high performance liquid chromatography[J]. Chemical Communications, 2002(7): 752-753.

Ryoo R, Joo S H, Jun S. Synthesis of highly ordered carbon molecular sieves via template-mediated structural transformation[J]. Journal of Physical Chemistry B, 1999, 103(37): 7743-7746.

Liang C D, Hong K L, Guiochon G A, et al. Synthesis of a large-scale highly ordered porous carbon film by self-assembly of block copolymers[J]. Angewandte Chemie-international Edition, 2004, 43(43): 5785-5789.

Meng Y, Gu D, Zhang F, et al. Ordered mesoporous polymers and homologous carbon frameworks: Amphiphilic surfactant templating and direct transformation[J]. Angewandte Chemie, 2005, 117(43): 7215-7221.

Wang J C, Kaskel S. KOH activation of carbon-based materials for energy storage[J]. Journal of Materials Chemistry, 2012, 22(45): 23710-23725.

Zhai Y, Dou Y, Zhao D, et al. Carbon materials for chemical capacitive energy storage[J]. Advanced Materials, 2011, 23(42): 4828-4850.

Lv Y, Zhang F, Dou Y, et al. A comprehensive study on KOH activation of ordered mesoporous carbons and their supercapacitor application[J]. Journal of Materials Chemistry, 2012, 22(1): 93-99.

Xu J, Wang A, Zhang T. A two-step synthesis of ordered mesoporous resorcinol-formaldehyde polymer and carbon[J]. Carbon, 2012, 50(5): 1807-1816.

Gorka J, Jaroniec M. Hierarchically porous phenolic resin-based carbons obtained by block copolymer-colloidal silica templating and post-synthesis activation with carbon dioxide and water vapor[J]. Carbon, 2011, 49(1): 154-160.

SHI Lei, XU Yan, XING Li-shu, et al. Synthesis and characterization of ordered mesoporous carbons CMK-3 produced by tailoring the mesopores of an AlSBA-15hard template synthesized without acid[J]. New Carbon Materials, 2014, 29(6): 515-521.

Raymundo-Piñero E, Kierzek K, Machnikowski J, et al. Relationship between the nanoporous texture of activated carbons and their capacitance properties in different electrolytes[J]. Carbon, 2006, 44(12): 2498-2507.

施引文献

资源附件(0)

访问统计